UBS rogue trader Kweku Adoboli's last phone call with bosses - audio

In this recorded phone call, UBS trader Kweku Adoboli is challenged on his illicit trades by one of the bank's back office accountants, William Steward. Minutes after the call in 2011 Adoboli walked out of the bank's headquarters and wrote an email confessing he had lost the bank huge sums of money. Adoboli was found guilty on Tuesday of two counts of fraud and sentenced to seven years in prison